Using the SetCookie function set a long cookie containg lots of characters that need encoding.  The following patch fixes
the problem, the size of the value string was calculated before it was encoded, and the string gets larger after encoding.

*** head.c.orig Fri Aug  7 22:37:32 1998
--- head.c      Mon Aug 17 14:23:52 1998
***************
*** 233,239 ****
        CookieList *cookie;
        int len = 0;
        time_t t;
!       char *r, *dt;
  #endif
  #if APACHE || defined(USE_SAPI) || FHTTPD
        char *tempstr;
--- 233,239 ----
        CookieList *cookie;
        int len = 0;
        time_t t;
!       char *dt, *cookievalue = NULL;
  #endif
  #if APACHE || defined(USE_SAPI) || FHTTPD
        char *tempstr;
***************
*** 259,266 ****
                while (cookie) {
                        if (cookie->name)
                                len += strlen(cookie->name);
!                       if (cookie->value)
!                               len += strlen(cookie->value);
                        if (cookie->path)
                                len += strlen(cookie->path);
                        if (cookie->domain)
--- 259,268 ----
                while (cookie) {
                        if (cookie->name)
                                len += strlen(cookie->name);
!                       if (cookie->value) {
!                               cookievalue = _php3_urlencode(cookie->value, str
len (cookie->value));
!                               len += strlen(cookievalue);
!                       }
                        if (cookie->path)
                                len += strlen(cookie->path);
                        if (cookie->domain)
***************
*** 280,292 ****
                                efree(dt);
                        } else {
                                /* FIXME: XXX: this is not binary data safe */
!                               r = _php3_urlencode(cookie->value, strlen (cooki
e->value));
!                               sprintf(tempstr, "%s=%s", cookie->name, cookie->
value ? r : "");
!                               if (r) efree(r);
                                if (cookie->name) efree(cookie->name);
                                if (cookie->value) efree(cookie->value);
                                cookie->name=NULL;
                                cookie->value=NULL;
                                if (cookie->expires > 0) {
                                        strcat(tempstr, "; expires=");
                                        dt = php3_std_date(cookie->expires);
--- 282,294 ----
                                efree(dt);
                        } else {
                                /* FIXME: XXX: this is not binary data safe */
!                               sprintf(tempstr, "%s=%s", cookie->name, cookie->
value ? cookievalue : "");
                                if (cookie->name) efree(cookie->name);
                                if (cookie->value) efree(cookie->value);
+                               if (cookievalue) efree(cookievalue);
                                cookie->name=NULL;
                                cookie->value=NULL;
+                               cookievalue=NULL;
                                if (cookie->expires > 0) {
                                        strcat(tempstr, "; expires=");
                                        dt = php3_std_date(cookie->expires);
***************
*** 314,319 ****
--- 316,322 ----
                        if (cookie->path) efree(cookie->path);
                        if (cookie->name) efree(cookie->name);
                        if (cookie->value) efree(cookie->value);
+                       if (cookievalue) efree(cookievalue);
                        efree(cookie);
                        cookie = php3_PopCookieList();
                        efree(tempstr);